Although "data" is the plural of "datum," these days "data" is used in both singular and plural constructs with the same meaning. To me, the singular form sounds better (i.e., "the data suggests"). Here's an explanation from Merriam-Webster:
Data leads a life of its own quite independent of datum, of which it
was originally the plural. It occurs in two constructions: such as a
plural noun (like earnings), taking a plural verb and plural modifiers
(such as these, many, and a few) but not cardinal numbers, and serving
as a referent for plural pronouns (such as they and them); and as an
abstract mass noun (like information), taking a singular verb and
singular modifiers (such as this, much, and little), and being
referred to by a singular pronoun (it). Both constructions are
standard. The plural construction is more common in print, evidently
because the house style of several publishers mandates it.